Mercurial > hg > truffle
annotate src/share/vm/runtime/frame.cpp @ 1250:3f5b7efb9642
6920293: OptimizeStringConcat causing core dumps
Reviewed-by: kvn, twisti
| author | never |
|---|---|
| date | Fri, 05 Feb 2010 11:07:40 -0800 |
| parents | 18a389214829 |
| children | e3a4305c6bc3 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1204 | 2 * Copyright 1997-2010 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_frame.cpp.incl" | |
| 27 | |
| 28 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) { | |
| 29 _thread = thread; | |
| 30 _update_map = update_map; | |
| 31 clear(); | |
| 32 debug_only(_update_for_id = NULL;) | |
| 33 #ifndef PRODUCT | |
| 34 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL; | |
| 35 #endif /* PRODUCT */ | |
| 36 } | |
| 37 | |
| 38 RegisterMap::RegisterMap(const RegisterMap* map) { | |
| 39 assert(map != this, "bad initialization parameter"); | |
| 40 assert(map != NULL, "RegisterMap must be present"); | |
| 41 _thread = map->thread(); | |
| 42 _update_map = map->update_map(); | |
| 43 _include_argument_oops = map->include_argument_oops(); | |
| 44 debug_only(_update_for_id = map->_update_for_id;) | |
| 45 pd_initialize_from(map); | |
| 46 if (update_map()) { | |
| 47 for(int i = 0; i < location_valid_size; i++) { | |
| 48 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i]; | |
| 49 _location_valid[i] = bits; | |
| 50 // for whichever bits are set, pull in the corresponding map->_location | |
| 51 int j = i*location_valid_type_size; | |
| 52 while (bits != 0) { | |
| 53 if ((bits & 1) != 0) { | |
| 54 assert(0 <= j && j < reg_count, "range check"); | |
| 55 _location[j] = map->_location[j]; | |
| 56 } | |
| 57 bits >>= 1; | |
| 58 j += 1; | |
| 59 } | |
| 60 } | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 void RegisterMap::clear() { | |
| 65 set_include_argument_oops(true); | |
| 66 if (_update_map) { | |
| 67 for(int i = 0; i < location_valid_size; i++) { | |
| 68 _location_valid[i] = 0; | |
| 69 } | |
| 70 pd_clear(); | |
| 71 } else { | |
| 72 pd_initialize(); | |
| 73 } | |
| 74 } | |
| 75 | |
| 76 #ifndef PRODUCT | |
| 77 | |
| 78 void RegisterMap::print_on(outputStream* st) const { | |
| 79 st->print_cr("Register map"); | |
| 80 for(int i = 0; i < reg_count; i++) { | |
| 81 | |
| 82 VMReg r = VMRegImpl::as_VMReg(i); | |
| 83 intptr_t* src = (intptr_t*) location(r); | |
| 84 if (src != NULL) { | |
| 85 | |
| 417 | 86 r->print_on(st); |
| 87 st->print(" [" INTPTR_FORMAT "] = ", src); | |
| 0 | 88 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) { |
| 417 | 89 st->print_cr("<misaligned>"); |
| 0 | 90 } else { |
| 417 | 91 st->print_cr(INTPTR_FORMAT, *src); |
| 0 | 92 } |
| 93 } | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 void RegisterMap::print() const { | |
| 98 print_on(tty); | |
| 99 } | |
| 100 | |
| 101 #endif | |
| 102 // This returns the pc that if you were in the debugger you'd see. Not | |
| 103 // the idealized value in the frame object. This undoes the magic conversion | |
| 104 // that happens for deoptimized frames. In addition it makes the value the | |
| 105 // hardware would want to see in the native frame. The only user (at this point) | |
| 106 // is deoptimization. It likely no one else should ever use it. | |
| 107 | |
| 108 address frame::raw_pc() const { | |
| 109 if (is_deoptimized_frame()) { | |
| 1204 | 110 nmethod* nm = cb()->as_nmethod_or_null(); |
| 111 if (nm->is_method_handle_return(pc())) | |
| 112 return nm->deopt_mh_handler_begin() - pc_return_offset; | |
| 113 else | |
| 114 return nm->deopt_handler_begin() - pc_return_offset; | |
| 0 | 115 } else { |
| 116 return (pc() - pc_return_offset); | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 // Change the pc in a frame object. This does not change the actual pc in | |
| 121 // actual frame. To do that use patch_pc. | |
| 122 // | |
| 123 void frame::set_pc(address newpc ) { | |
| 124 #ifdef ASSERT | |
| 125 if (_cb != NULL && _cb->is_nmethod()) { | |
| 126 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation"); | |
| 127 } | |
| 128 #endif // ASSERT | |
| 129 | |
| 130 // Unsafe to use the is_deoptimzed tester after changing pc | |
| 131 _deopt_state = unknown; | |
| 132 _pc = newpc; | |
| 133 _cb = CodeCache::find_blob_unsafe(_pc); | |
| 134 | |
| 135 } | |
| 136 | |
| 137 // type testers | |
| 138 bool frame::is_deoptimized_frame() const { | |
| 139 assert(_deopt_state != unknown, "not answerable"); | |
| 140 return _deopt_state == is_deoptimized; | |
| 141 } | |
| 142 | |
| 143 bool frame::is_native_frame() const { | |
| 144 return (_cb != NULL && | |
| 145 _cb->is_nmethod() && | |
| 146 ((nmethod*)_cb)->is_native_method()); | |
| 147 } | |
| 148 | |
| 149 bool frame::is_java_frame() const { | |
| 150 if (is_interpreted_frame()) return true; | |
| 151 if (is_compiled_frame()) return true; | |
| 152 return false; | |
| 153 } | |
| 154 | |
| 155 | |
| 156 bool frame::is_compiled_frame() const { | |
| 157 if (_cb != NULL && | |
| 158 _cb->is_nmethod() && | |
| 159 ((nmethod*)_cb)->is_java_method()) { | |
| 160 return true; | |
| 161 } | |
| 162 return false; | |
| 163 } | |
| 164 | |
| 165 | |
| 166 bool frame::is_runtime_frame() const { | |
| 167 return (_cb != NULL && _cb->is_runtime_stub()); | |
| 168 } | |
| 169 | |
| 170 bool frame::is_safepoint_blob_frame() const { | |
| 171 return (_cb != NULL && _cb->is_safepoint_stub()); | |
| 172 } | |
| 173 | |
| 174 // testers | |
| 175 | |
| 176 bool frame::is_first_java_frame() const { | |
| 177 RegisterMap map(JavaThread::current(), false); // No update | |
| 178 frame s; | |
| 179 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)); | |
| 180 return s.is_first_frame(); | |
| 181 } | |
| 182 | |
| 183 | |
| 184 bool frame::entry_frame_is_first() const { | |
| 185 return entry_frame_call_wrapper()->anchor()->last_Java_sp() == NULL; | |
| 186 } | |
| 187 | |
| 188 | |
| 189 bool frame::should_be_deoptimized() const { | |
| 190 if (_deopt_state == is_deoptimized || | |
| 191 !is_compiled_frame() ) return false; | |
| 192 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod"); | |
| 193 nmethod* nm = (nmethod *)_cb; | |
| 194 if (TraceDependencies) { | |
| 195 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false"); | |
| 196 nm->print_value_on(tty); | |
| 197 tty->cr(); | |
| 198 } | |
| 199 | |
| 200 if( !nm->is_marked_for_deoptimization() ) | |
| 201 return false; | |
| 202 | |
| 203 // If at the return point, then the frame has already been popped, and | |
| 204 // only the return needs to be executed. Don't deoptimize here. | |
| 205 return !nm->is_at_poll_return(pc()); | |
| 206 } | |
| 207 | |
| 208 bool frame::can_be_deoptimized() const { | |
| 209 if (!is_compiled_frame()) return false; | |
| 210 nmethod* nm = (nmethod*)_cb; | |
| 211 | |
| 212 if( !nm->can_be_deoptimized() ) | |
| 213 return false; | |
| 214 | |
| 215 return !nm->is_at_poll_return(pc()); | |
| 216 } | |
| 217 | |
| 218 void frame::deoptimize(JavaThread* thread, bool thread_is_known_safe) { | |
| 219 // Schedule deoptimization of an nmethod activation with this frame. | |
| 220 | |
| 221 // Store the original pc before an patch (or request to self-deopt) | |
| 222 // in the published location of the frame. | |
| 223 | |
| 224 assert(_cb != NULL && _cb->is_nmethod(), "must be"); | |
| 225 nmethod* nm = (nmethod*)_cb; | |
| 226 | |
| 227 // This is a fix for register window patching race | |
| 228 if (NeedsDeoptSuspend && !thread_is_known_safe) { | |
| 229 | |
| 230 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that | |
| 231 // we could see the frame again and ask for it to be deoptimized since | |
| 232 // it might move for a long time. That is harmless and we just ignore it. | |
| 233 if (id() == thread->must_deopt_id()) { | |
| 234 assert(thread->is_deopt_suspend(), "lost suspension"); | |
| 235 return; | |
| 236 } | |
| 237 | |
| 238 // We are at a safepoint so the target thread can only be | |
| 239 // in 4 states: | |
| 240 // blocked - no problem | |
| 241 // blocked_trans - no problem (i.e. could have woken up from blocked | |
| 242 // during a safepoint). | |
| 243 // native - register window pc patching race | |
| 244 // native_trans - momentary state | |
| 245 // | |
| 246 // We could just wait out a thread in native_trans to block. | |
| 247 // Then we'd have all the issues that the safepoint code has as to | |
| 248 // whether to spin or block. It isn't worth it. Just treat it like | |
| 249 // native and be done with it. | |
| 250 // | |
| 251 JavaThreadState state = thread->thread_state(); | |
| 252 if (state == _thread_in_native || state == _thread_in_native_trans) { | |
| 253 // Since we are at a safepoint the target thread will stop itself | |
| 254 // before it can return to java as long as we remain at the safepoint. | |
| 255 // Therefore we can put an additional request for the thread to stop | |
| 256 // no matter what no (like a suspend). This will cause the thread | |
| 257 // to notice it needs to do the deopt on its own once it leaves native. | |
| 258 // | |
| 259 // The only reason we must do this is because on machine with register | |
| 260 // windows we have a race with patching the return address and the | |
| 261 // window coming live as the thread returns to the Java code (but still | |
| 262 // in native mode) and then blocks. It is only this top most frame | |
| 263 // that is at risk. So in truth we could add an additional check to | |
| 264 // see if this frame is one that is at risk. | |
| 265 RegisterMap map(thread, false); | |
| 266 frame at_risk = thread->last_frame().sender(&map); | |
| 267 if (id() == at_risk.id()) { | |
| 268 thread->set_must_deopt_id(id()); | |
| 269 thread->set_deopt_suspend(); | |
| 270 return; | |
| 271 } | |
| 272 } | |
| 273 } // NeedsDeoptSuspend | |
| 274 | |
| 275 | |
| 1204 | 276 // If the call site is a MethodHandle call site use the MH deopt |
| 277 // handler. | |
| 278 address deopt = nm->is_method_handle_return(pc()) ? | |
| 279 nm->deopt_mh_handler_begin() : | |
| 280 nm->deopt_handler_begin(); | |
| 281 | |
| 0 | 282 // Save the original pc before we patch in the new one |
| 283 nm->set_original_pc(this, pc()); | |
| 284 patch_pc(thread, deopt); | |
| 1204 | 285 |
| 0 | 286 #ifdef ASSERT |
| 287 { | |
| 288 RegisterMap map(thread, false); | |
| 289 frame check = thread->last_frame(); | |
| 290 while (id() != check.id()) { | |
| 291 check = check.sender(&map); | |
| 292 } | |
| 293 assert(check.is_deoptimized_frame(), "missed deopt"); | |
| 294 } | |
| 295 #endif // ASSERT | |
| 296 } | |
| 297 | |
| 298 frame frame::java_sender() const { | |
| 299 RegisterMap map(JavaThread::current(), false); | |
| 300 frame s; | |
| 301 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ; | |
| 302 guarantee(s.is_java_frame(), "tried to get caller of first java frame"); | |
| 303 return s; | |
| 304 } | |
| 305 | |
| 306 frame frame::real_sender(RegisterMap* map) const { | |
| 307 frame result = sender(map); | |
| 308 while (result.is_runtime_frame()) { | |
| 309 result = result.sender(map); | |
| 310 } | |
| 311 return result; | |
| 312 } | |
| 313 | |
| 314 // Note: called by profiler - NOT for current thread | |
| 315 frame frame::profile_find_Java_sender_frame(JavaThread *thread) { | |
| 316 // If we don't recognize this frame, walk back up the stack until we do | |
| 317 RegisterMap map(thread, false); | |
| 318 frame first_java_frame = frame(); | |
| 319 | |
| 320 // Find the first Java frame on the stack starting with input frame | |
| 321 if (is_java_frame()) { | |
| 322 // top frame is compiled frame or deoptimized frame | |
| 323 first_java_frame = *this; | |
| 324 } else if (safe_for_sender(thread)) { | |
| 325 for (frame sender_frame = sender(&map); | |
| 326 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame(); | |
| 327 sender_frame = sender_frame.sender(&map)) { | |
| 328 if (sender_frame.is_java_frame()) { | |
| 329 first_java_frame = sender_frame; | |
| 330 break; | |
| 331 } | |
| 332 } | |
| 333 } | |
| 334 return first_java_frame; | |
| 335 } | |
| 336 | |
| 337 // Interpreter frames | |
| 338 | |
| 339 | |
| 340 void frame::interpreter_frame_set_locals(intptr_t* locs) { | |
| 341 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 342 *interpreter_frame_locals_addr() = locs; | |
| 343 } | |
| 344 | |
| 345 methodOop frame::interpreter_frame_method() const { | |
| 346 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 347 methodOop m = *interpreter_frame_method_addr(); | |
| 348 assert(m->is_perm(), "bad methodOop in interpreter frame"); | |
| 349 assert(m->is_method(), "not a methodOop"); | |
| 350 return m; | |
| 351 } | |
| 352 | |
| 353 void frame::interpreter_frame_set_method(methodOop method) { | |
| 354 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 355 *interpreter_frame_method_addr() = method; | |
| 356 } | |
| 357 | |
| 358 void frame::interpreter_frame_set_bcx(intptr_t bcx) { | |
| 359 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 360 if (ProfileInterpreter) { | |
| 361 bool formerly_bci = is_bci(interpreter_frame_bcx()); | |
| 362 bool is_now_bci = is_bci(bcx); | |
| 363 *interpreter_frame_bcx_addr() = bcx; | |
| 364 | |
| 365 intptr_t mdx = interpreter_frame_mdx(); | |
| 366 | |
| 367 if (mdx != 0) { | |
| 368 if (formerly_bci) { | |
| 369 if (!is_now_bci) { | |
| 370 // The bcx was just converted from bci to bcp. | |
| 371 // Convert the mdx in parallel. | |
| 372 methodDataOop mdo = interpreter_frame_method()->method_data(); | |
| 373 assert(mdo != NULL, ""); | |
| 374 int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one. | |
| 375 address mdp = mdo->di_to_dp(mdi); | |
| 376 interpreter_frame_set_mdx((intptr_t)mdp); | |
| 377 } | |
| 378 } else { | |
| 379 if (is_now_bci) { | |
| 380 // The bcx was just converted from bcp to bci. | |
| 381 // Convert the mdx in parallel. | |
| 382 methodDataOop mdo = interpreter_frame_method()->method_data(); | |
| 383 assert(mdo != NULL, ""); | |
| 384 int mdi = mdo->dp_to_di((address)mdx); | |
| 385 interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0. | |
| 386 } | |
| 387 } | |
| 388 } | |
| 389 } else { | |
| 390 *interpreter_frame_bcx_addr() = bcx; | |
| 391 } | |
| 392 } | |
| 393 | |
| 394 jint frame::interpreter_frame_bci() const { | |
| 395 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 396 intptr_t bcx = interpreter_frame_bcx(); | |
| 397 return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx); | |
| 398 } | |
| 399 | |
| 400 void frame::interpreter_frame_set_bci(jint bci) { | |
| 401 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 402 assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC"); | |
| 403 interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci)); | |
| 404 } | |
| 405 | |
| 406 address frame::interpreter_frame_bcp() const { | |
| 407 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 408 intptr_t bcx = interpreter_frame_bcx(); | |
| 409 return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx; | |
| 410 } | |
| 411 | |
| 412 void frame::interpreter_frame_set_bcp(address bcp) { | |
| 413 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 414 assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC"); | |
| 415 interpreter_frame_set_bcx((intptr_t)bcp); | |
| 416 } | |
| 417 | |
| 418 void frame::interpreter_frame_set_mdx(intptr_t mdx) { | |
| 419 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 420 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 421 *interpreter_frame_mdx_addr() = mdx; | |
| 422 } | |
| 423 | |
| 424 address frame::interpreter_frame_mdp() const { | |
| 425 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 426 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 427 intptr_t bcx = interpreter_frame_bcx(); | |
| 428 intptr_t mdx = interpreter_frame_mdx(); | |
| 429 | |
| 430 assert(!is_bci(bcx), "should not access mdp during GC"); | |
| 431 return (address)mdx; | |
| 432 } | |
| 433 | |
| 434 void frame::interpreter_frame_set_mdp(address mdp) { | |
| 435 assert(is_interpreted_frame(), "interpreted frame expected"); | |
| 436 if (mdp == NULL) { | |
| 437 // Always allow the mdp to be cleared. | |
| 438 interpreter_frame_set_mdx((intptr_t)mdp); | |
| 439 } | |
| 440 intptr_t bcx = interpreter_frame_bcx(); | |
| 441 assert(!is_bci(bcx), "should not set mdp during GC"); | |
| 442 interpreter_frame_set_mdx((intptr_t)mdp); | |
| 443 } | |
| 444 | |
| 445 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const { | |
| 446 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 447 #ifdef ASSERT | |
| 448 interpreter_frame_verify_monitor(current); | |
| 449 #endif | |
| 450 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size()); | |
| 451 return next; | |
| 452 } | |
| 453 | |
| 454 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const { | |
| 455 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 456 #ifdef ASSERT | |
| 457 // // This verification needs to be checked before being enabled | |
| 458 // interpreter_frame_verify_monitor(current); | |
| 459 #endif | |
| 460 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size()); | |
| 461 return previous; | |
| 462 } | |
| 463 | |
| 464 // Interpreter locals and expression stack locations. | |
| 465 | |
| 466 intptr_t* frame::interpreter_frame_local_at(int index) const { | |
| 467 const int n = Interpreter::local_offset_in_bytes(index)/wordSize; | |
| 468 return &((*interpreter_frame_locals_addr())[n]); | |
| 469 } | |
| 470 | |
| 471 frame::Tag frame::interpreter_frame_local_tag(int index) const { | |
| 472 const int n = Interpreter::local_tag_offset_in_bytes(index)/wordSize; | |
| 473 return (Tag)(*interpreter_frame_locals_addr()) [n]; | |
| 474 } | |
| 475 | |
| 476 void frame::interpreter_frame_set_local_tag(int index, Tag tag) const { | |
| 477 const int n = Interpreter::local_tag_offset_in_bytes(index)/wordSize; | |
| 478 (*interpreter_frame_locals_addr())[n] = (intptr_t)tag; | |
| 479 } | |
| 480 | |
| 481 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const { | |
| 482 const int i = offset * interpreter_frame_expression_stack_direction(); | |
| 483 const int n = ((i * Interpreter::stackElementSize()) + | |
| 484 Interpreter::value_offset_in_bytes())/wordSize; | |
| 485 return &(interpreter_frame_expression_stack()[n]); | |
| 486 } | |
| 487 | |
| 488 frame::Tag frame::interpreter_frame_expression_stack_tag(jint offset) const { | |
| 489 const int i = offset * interpreter_frame_expression_stack_direction(); | |
| 490 const int n = ((i * Interpreter::stackElementSize()) + | |
| 491 Interpreter::tag_offset_in_bytes())/wordSize; | |
| 492 return (Tag)(interpreter_frame_expression_stack()[n]); | |
| 493 } | |
| 494 | |
| 495 void frame::interpreter_frame_set_expression_stack_tag(jint offset, | |
| 496 Tag tag) const { | |
| 497 const int i = offset * interpreter_frame_expression_stack_direction(); | |
| 498 const int n = ((i * Interpreter::stackElementSize()) + | |
| 499 Interpreter::tag_offset_in_bytes())/wordSize; | |
| 500 interpreter_frame_expression_stack()[n] = (intptr_t)tag; | |
| 501 } | |
| 502 | |
| 503 jint frame::interpreter_frame_expression_stack_size() const { | |
| 504 // Number of elements on the interpreter expression stack | |
| 505 // Callers should span by stackElementWords | |
| 506 int element_size = Interpreter::stackElementWords(); | |
| 507 if (frame::interpreter_frame_expression_stack_direction() < 0) { | |
| 508 return (interpreter_frame_expression_stack() - | |
| 509 interpreter_frame_tos_address() + 1)/element_size; | |
| 510 } else { | |
| 511 return (interpreter_frame_tos_address() - | |
| 512 interpreter_frame_expression_stack() + 1)/element_size; | |
| 513 } | |
| 514 } | |
| 515 | |
| 516 | |
| 517 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp) | |
| 518 | |
| 519 const char* frame::print_name() const { | |
| 520 if (is_native_frame()) return "Native"; | |
| 521 if (is_interpreted_frame()) return "Interpreted"; | |
| 522 if (is_compiled_frame()) { | |
| 523 if (is_deoptimized_frame()) return "Deoptimized"; | |
| 524 return "Compiled"; | |
| 525 } | |
| 526 if (sp() == NULL) return "Empty"; | |
| 527 return "C"; | |
| 528 } | |
| 529 | |
| 530 void frame::print_value_on(outputStream* st, JavaThread *thread) const { | |
| 531 NOT_PRODUCT(address begin = pc()-40;) | |
| 532 NOT_PRODUCT(address end = NULL;) | |
| 533 | |
| 534 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp()); | |
| 535 if (sp() != NULL) | |
| 536 st->print(", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), pc()); | |
| 537 | |
| 538 if (StubRoutines::contains(pc())) { | |
| 539 st->print_cr(")"); | |
| 540 st->print("("); | |
| 541 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); | |
| 542 st->print("~Stub::%s", desc->name()); | |
| 543 NOT_PRODUCT(begin = desc->begin(); end = desc->end();) | |
| 544 } else if (Interpreter::contains(pc())) { | |
| 545 st->print_cr(")"); | |
| 546 st->print("("); | |
| 547 InterpreterCodelet* desc = Interpreter::codelet_containing(pc()); | |
| 548 if (desc != NULL) { | |
| 549 st->print("~"); | |
| 550 desc->print(); | |
| 551 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();) | |
| 552 } else { | |
| 553 st->print("~interpreter"); | |
| 554 } | |
| 555 } | |
| 556 st->print_cr(")"); | |
| 557 | |
| 558 if (_cb != NULL) { | |
| 559 st->print(" "); | |
| 560 _cb->print_value_on(st); | |
| 561 st->cr(); | |
| 562 #ifndef PRODUCT | |
| 563 if (end == NULL) { | |
| 564 begin = _cb->instructions_begin(); | |
| 565 end = _cb->instructions_end(); | |
| 566 } | |
| 567 #endif | |
| 568 } | |
| 569 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);) | |
| 570 } | |
| 571 | |
| 572 | |
| 573 void frame::print_on(outputStream* st) const { | |
| 574 print_value_on(st,NULL); | |
| 575 if (is_interpreted_frame()) { | |
| 576 interpreter_frame_print_on(st); | |
| 577 } | |
| 578 } | |
| 579 | |
| 580 | |
| 581 void frame::interpreter_frame_print_on(outputStream* st) const { | |
| 582 #ifndef PRODUCT | |
| 583 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 584 jint i; | |
| 585 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) { | |
| 586 intptr_t x = *interpreter_frame_local_at(i); | |
| 587 st->print(" - local [" INTPTR_FORMAT "]", x); | |
| 588 if (TaggedStackInterpreter) { | |
| 589 Tag x = interpreter_frame_local_tag(i); | |
| 590 st->print(" - local tag [" INTPTR_FORMAT "]", x); | |
| 591 } | |
| 592 st->fill_to(23); | |
| 593 st->print_cr("; #%d", i); | |
| 594 } | |
| 595 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) { | |
| 596 intptr_t x = *interpreter_frame_expression_stack_at(i); | |
| 597 st->print(" - stack [" INTPTR_FORMAT "]", x); | |
| 598 if (TaggedStackInterpreter) { | |
| 599 Tag x = interpreter_frame_expression_stack_tag(i); | |
| 600 st->print(" - stack tag [" INTPTR_FORMAT "]", x); | |
| 601 } | |
| 602 st->fill_to(23); | |
| 603 st->print_cr("; #%d", i); | |
| 604 } | |
| 605 // locks for synchronization | |
| 606 for (BasicObjectLock* current = interpreter_frame_monitor_end(); | |
| 607 current < interpreter_frame_monitor_begin(); | |
| 608 current = next_monitor_in_interpreter_frame(current)) { | |
| 609 st->print_cr(" [ - obj "); | |
| 610 current->obj()->print_value_on(st); | |
| 611 st->cr(); | |
| 612 st->print_cr(" - lock "); | |
| 613 current->lock()->print_on(st); | |
| 614 st->cr(); | |
| 615 } | |
| 616 // monitor | |
| 617 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin()); | |
| 618 // bcp | |
| 619 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp()); | |
| 620 st->fill_to(23); | |
| 621 st->print_cr("; @%d", interpreter_frame_bci()); | |
| 622 // locals | |
| 623 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0)); | |
| 624 // method | |
| 625 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method()); | |
| 626 st->fill_to(23); | |
| 627 st->print("; "); | |
| 628 interpreter_frame_method()->print_name(st); | |
| 629 st->cr(); | |
| 630 #endif | |
| 631 } | |
| 632 | |
| 633 // Return whether the frame is in the VM or os indicating a Hotspot problem. | |
| 634 // Otherwise, it's likely a bug in the native library that the Java code calls, | |
| 635 // hopefully indicating where to submit bugs. | |
| 636 static void print_C_frame(outputStream* st, char* buf, int buflen, address pc) { | |
| 637 // C/C++ frame | |
| 638 bool in_vm = os::address_is_in_vm(pc); | |
| 639 st->print(in_vm ? "V" : "C"); | |
| 640 | |
| 641 int offset; | |
| 642 bool found; | |
| 643 | |
| 644 // libname | |
| 645 found = os::dll_address_to_library_name(pc, buf, buflen, &offset); | |
| 646 if (found) { | |
| 647 // skip directory names | |
| 648 const char *p1, *p2; | |
| 649 p1 = buf; | |
| 650 int len = (int)strlen(os::file_separator()); | |
| 651 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
| 652 st->print(" [%s+0x%x]", p1, offset); | |
| 653 } else { | |
| 654 st->print(" " PTR_FORMAT, pc); | |
| 655 } | |
| 656 | |
| 657 // function name - os::dll_address_to_function_name() may return confusing | |
| 658 // names if pc is within jvm.dll or libjvm.so, because JVM only has | |
| 659 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this | |
| 660 // only for native libraries. | |
| 661 if (!in_vm) { | |
| 662 found = os::dll_address_to_function_name(pc, buf, buflen, &offset); | |
| 663 | |
| 664 if (found) { | |
| 665 st->print(" %s+0x%x", buf, offset); | |
| 666 } | |
| 667 } | |
| 668 } | |
| 669 | |
| 670 // frame::print_on_error() is called by fatal error handler. Notice that we may | |
| 671 // crash inside this function if stack frame is corrupted. The fatal error | |
| 672 // handler can catch and handle the crash. Here we assume the frame is valid. | |
| 673 // | |
| 674 // First letter indicates type of the frame: | |
| 675 // J: Java frame (compiled) | |
| 676 // j: Java frame (interpreted) | |
| 677 // V: VM frame (C/C++) | |
| 678 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.) | |
| 679 // C: C/C++ frame | |
| 680 // | |
| 681 // We don't need detailed frame type as that in frame::print_name(). "C" | |
| 682 // suggests the problem is in user lib; everything else is likely a VM bug. | |
| 683 | |
| 684 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const { | |
| 685 if (_cb != NULL) { | |
| 686 if (Interpreter::contains(pc())) { | |
| 687 methodOop m = this->interpreter_frame_method(); | |
| 688 if (m != NULL) { | |
| 689 m->name_and_sig_as_C_string(buf, buflen); | |
| 690 st->print("j %s", buf); | |
| 691 st->print("+%d", this->interpreter_frame_bci()); | |
| 692 } else { | |
| 693 st->print("j " PTR_FORMAT, pc()); | |
| 694 } | |
| 695 } else if (StubRoutines::contains(pc())) { | |
| 696 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); | |
| 697 if (desc != NULL) { | |
| 698 st->print("v ~StubRoutines::%s", desc->name()); | |
| 699 } else { | |
| 700 st->print("v ~StubRoutines::" PTR_FORMAT, pc()); | |
| 701 } | |
| 702 } else if (_cb->is_buffer_blob()) { | |
| 703 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name()); | |
| 704 } else if (_cb->is_nmethod()) { | |
| 705 methodOop m = ((nmethod *)_cb)->method(); | |
| 706 if (m != NULL) { | |
| 707 m->name_and_sig_as_C_string(buf, buflen); | |
| 708 st->print("J %s", buf); | |
| 709 } else { | |
| 710 st->print("J " PTR_FORMAT, pc()); | |
| 711 } | |
| 712 } else if (_cb->is_runtime_stub()) { | |
| 713 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name()); | |
| 714 } else if (_cb->is_deoptimization_stub()) { | |
| 715 st->print("v ~DeoptimizationBlob"); | |
| 716 } else if (_cb->is_exception_stub()) { | |
| 717 st->print("v ~ExceptionBlob"); | |
| 718 } else if (_cb->is_safepoint_stub()) { | |
| 719 st->print("v ~SafepointBlob"); | |
| 720 } else { | |
| 721 st->print("v blob " PTR_FORMAT, pc()); | |
| 722 } | |
| 723 } else { | |
| 724 print_C_frame(st, buf, buflen, pc()); | |
| 725 } | |
| 726 } | |
| 727 | |
| 728 | |
| 729 /* | |
| 730 The interpreter_frame_expression_stack_at method in the case of SPARC needs the | |
| 731 max_stack value of the method in order to compute the expression stack address. | |
| 732 It uses the methodOop in order to get the max_stack value but during GC this | |
| 733 methodOop value saved on the frame is changed by reverse_and_push and hence cannot | |
| 734 be used. So we save the max_stack value in the FrameClosure object and pass it | |
| 735 down to the interpreter_frame_expression_stack_at method | |
| 736 */ | |
| 737 class InterpreterFrameClosure : public OffsetClosure { | |
| 738 private: | |
| 739 frame* _fr; | |
| 740 OopClosure* _f; | |
| 741 int _max_locals; | |
| 742 int _max_stack; | |
| 743 | |
| 744 public: | |
| 745 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack, | |
| 746 OopClosure* f) { | |
| 747 _fr = fr; | |
| 748 _max_locals = max_locals; | |
| 749 _max_stack = max_stack; | |
| 750 _f = f; | |
| 751 } | |
| 752 | |
| 753 void offset_do(int offset) { | |
| 754 oop* addr; | |
| 755 if (offset < _max_locals) { | |
| 756 addr = (oop*) _fr->interpreter_frame_local_at(offset); | |
| 757 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame"); | |
| 758 _f->do_oop(addr); | |
| 759 } else { | |
| 760 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals)); | |
| 761 // In case of exceptions, the expression stack is invalid and the esp will be reset to express | |
| 762 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel). | |
| 763 bool in_stack; | |
| 764 if (frame::interpreter_frame_expression_stack_direction() > 0) { | |
| 765 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address(); | |
| 766 } else { | |
| 767 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address(); | |
| 768 } | |
| 769 if (in_stack) { | |
| 770 _f->do_oop(addr); | |
| 771 } | |
| 772 } | |
| 773 } | |
| 774 | |
| 775 int max_locals() { return _max_locals; } | |
| 776 frame* fr() { return _fr; } | |
| 777 }; | |
| 778 | |
| 779 | |
| 780 class InterpretedArgumentOopFinder: public SignatureInfo { | |
| 781 private: | |
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782 OopClosure* _f; // Closure to invoke |
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783 int _offset; // TOS-relative offset, decremented with each argument |
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784 bool _has_receiver; // true if the callee has a receiver |
| 0 | 785 frame* _fr; |
| 786 | |
| 787 void set(int size, BasicType type) { | |
| 788 _offset -= size; | |
| 789 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do(); | |
| 790 } | |
| 791 | |
| 792 void oop_offset_do() { | |
| 793 oop* addr; | |
| 794 addr = (oop*)_fr->interpreter_frame_tos_at(_offset); | |
| 795 _f->do_oop(addr); | |
| 796 } | |
| 797 | |
| 798 public: | |
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799 InterpretedArgumentOopFinder(symbolHandle signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) { |
| 0 | 800 // compute size of arguments |
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801 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); |
| 0 | 802 assert(!fr->is_interpreted_frame() || |
| 803 args_size <= fr->interpreter_frame_expression_stack_size(), | |
| 804 "args cannot be on stack anymore"); | |
| 805 // initialize InterpretedArgumentOopFinder | |
| 806 _f = f; | |
| 807 _fr = fr; | |
| 808 _offset = args_size; | |
| 809 } | |
| 810 | |
| 811 void oops_do() { | |
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812 if (_has_receiver) { |
| 0 | 813 --_offset; |
| 814 oop_offset_do(); | |
| 815 } | |
| 816 iterate_parameters(); | |
| 817 } | |
| 818 }; | |
| 819 | |
| 820 | |
| 821 // Entry frame has following form (n arguments) | |
| 822 // +-----------+ | |
| 823 // sp -> | last arg | | |
| 824 // +-----------+ | |
| 825 // : ::: : | |
| 826 // +-----------+ | |
| 827 // (sp+n)->| first arg| | |
| 828 // +-----------+ | |
| 829 | |
| 830 | |
| 831 | |
| 832 // visits and GC's all the arguments in entry frame | |
| 833 class EntryFrameOopFinder: public SignatureInfo { | |
| 834 private: | |
| 835 bool _is_static; | |
| 836 int _offset; | |
| 837 frame* _fr; | |
| 838 OopClosure* _f; | |
| 839 | |
| 840 void set(int size, BasicType type) { | |
| 841 assert (_offset >= 0, "illegal offset"); | |
| 842 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset); | |
| 843 _offset -= size; | |
| 844 } | |
| 845 | |
| 846 void oop_at_offset_do(int offset) { | |
| 847 assert (offset >= 0, "illegal offset") | |
| 848 oop* addr = (oop*) _fr->entry_frame_argument_at(offset); | |
| 849 _f->do_oop(addr); | |
| 850 } | |
| 851 | |
| 852 public: | |
| 853 EntryFrameOopFinder(frame* frame, symbolHandle signature, bool is_static) : SignatureInfo(signature) { | |
| 854 _f = NULL; // will be set later | |
| 855 _fr = frame; | |
| 856 _is_static = is_static; | |
| 857 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0 | |
| 858 } | |
| 859 | |
| 860 void arguments_do(OopClosure* f) { | |
| 861 _f = f; | |
| 862 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver | |
| 863 iterate_parameters(); | |
| 864 } | |
| 865 | |
| 866 }; | |
| 867 | |
| 868 oop* frame::interpreter_callee_receiver_addr(symbolHandle signature) { | |
| 869 ArgumentSizeComputer asc(signature); | |
| 870 int size = asc.size(); | |
| 871 return (oop *)interpreter_frame_tos_at(size); | |
| 872 } | |
| 873 | |
| 874 | |
| 875 void frame::oops_interpreted_do(OopClosure* f, const RegisterMap* map, bool query_oop_map_cache) { | |
| 876 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 877 assert(map != NULL, "map must be set"); | |
| 878 Thread *thread = Thread::current(); | |
| 879 methodHandle m (thread, interpreter_frame_method()); | |
| 880 jint bci = interpreter_frame_bci(); | |
| 881 | |
| 882 assert(Universe::heap()->is_in(m()), "must be valid oop"); | |
| 883 assert(m->is_method(), "checking frame value"); | |
| 884 assert((m->is_native() && bci == 0) || (!m->is_native() && bci >= 0 && bci < m->code_size()), "invalid bci value"); | |
| 885 | |
| 886 // Handle the monitor elements in the activation | |
| 887 for ( | |
| 888 BasicObjectLock* current = interpreter_frame_monitor_end(); | |
| 889 current < interpreter_frame_monitor_begin(); | |
| 890 current = next_monitor_in_interpreter_frame(current) | |
| 891 ) { | |
| 892 #ifdef ASSERT | |
| 893 interpreter_frame_verify_monitor(current); | |
| 894 #endif | |
| 895 current->oops_do(f); | |
| 896 } | |
| 897 | |
| 898 // process fixed part | |
| 899 f->do_oop((oop*)interpreter_frame_method_addr()); | |
| 900 f->do_oop((oop*)interpreter_frame_cache_addr()); | |
| 901 | |
| 902 // Hmm what about the mdp? | |
| 903 #ifdef CC_INTERP | |
| 904 // Interpreter frame in the midst of a call have a methodOop within the | |
| 905 // object. | |
| 906 interpreterState istate = get_interpreterState(); | |
| 907 if (istate->msg() == BytecodeInterpreter::call_method) { | |
| 908 f->do_oop((oop*)&istate->_result._to_call._callee); | |
| 909 } | |
| 910 | |
| 911 #endif /* CC_INTERP */ | |
| 912 | |
| 913 if (m->is_native()) { | |
| 914 #ifdef CC_INTERP | |
| 915 f->do_oop((oop*)&istate->_oop_temp); | |
| 916 #else | |
| 917 f->do_oop((oop*)( fp() + interpreter_frame_oop_temp_offset )); | |
| 918 #endif /* CC_INTERP */ | |
| 919 } | |
| 920 | |
| 921 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); | |
| 922 | |
| 923 symbolHandle signature; | |
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924 bool has_receiver = false; |
| 0 | 925 |
| 926 // Process a callee's arguments if we are at a call site | |
| 927 // (i.e., if we are at an invoke bytecode) | |
| 928 // This is used sometimes for calling into the VM, not for another | |
| 929 // interpreted or compiled frame. | |
| 930 if (!m->is_native()) { | |
| 931 Bytecode_invoke *call = Bytecode_invoke_at_check(m, bci); | |
| 932 if (call != NULL) { | |
| 933 signature = symbolHandle(thread, call->signature()); | |
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934 has_receiver = call->has_receiver(); |
| 0 | 935 if (map->include_argument_oops() && |
| 936 interpreter_frame_expression_stack_size() > 0) { | |
| 937 ResourceMark rm(thread); // is this right ??? | |
| 938 // we are at a call site & the expression stack is not empty | |
| 939 // => process callee's arguments | |
| 940 // | |
| 941 // Note: The expression stack can be empty if an exception | |
| 605 | 942 // occurred during method resolution/execution. In all |
| 0 | 943 // cases we empty the expression stack completely be- |
| 944 // fore handling the exception (the exception handling | |
| 945 // code in the interpreter calls a blocking runtime | |
| 946 // routine which can cause this code to be executed). | |
| 947 // (was bug gri 7/27/98) | |
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948 oops_interpreted_arguments_do(signature, has_receiver, f); |
| 0 | 949 } |
| 950 } | |
| 951 } | |
| 952 | |
| 953 if (TaggedStackInterpreter) { | |
| 954 // process locals & expression stack | |
| 955 InterpreterOopMap *mask = NULL; | |
| 956 #ifdef ASSERT | |
| 957 InterpreterOopMap oopmap_mask; | |
| 958 OopMapCache::compute_one_oop_map(m, bci, &oopmap_mask); | |
| 959 mask = &oopmap_mask; | |
| 960 #endif // ASSERT | |
| 961 oops_interpreted_locals_do(f, max_locals, mask); | |
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962 oops_interpreted_expressions_do(f, signature, has_receiver, |
| 0 | 963 m->max_stack(), |
| 964 max_locals, mask); | |
| 965 } else { | |
| 966 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f); | |
| 967 | |
| 968 // process locals & expression stack | |
| 969 InterpreterOopMap mask; | |
| 970 if (query_oop_map_cache) { | |
| 971 m->mask_for(bci, &mask); | |
| 972 } else { | |
| 973 OopMapCache::compute_one_oop_map(m, bci, &mask); | |
| 974 } | |
| 975 mask.iterate_oop(&blk); | |
| 976 } | |
| 977 } | |
| 978 | |
| 979 | |
| 980 void frame::oops_interpreted_locals_do(OopClosure *f, | |
| 981 int max_locals, | |
| 982 InterpreterOopMap *mask) { | |
| 983 // Process locals then interpreter expression stack | |
| 984 for (int i = 0; i < max_locals; i++ ) { | |
| 985 Tag tag = interpreter_frame_local_tag(i); | |
| 986 if (tag == TagReference) { | |
| 987 oop* addr = (oop*) interpreter_frame_local_at(i); | |
| 988 assert((intptr_t*)addr >= sp(), "must be inside the frame"); | |
| 989 f->do_oop(addr); | |
| 990 #ifdef ASSERT | |
| 991 } else { | |
| 992 assert(tag == TagValue, "bad tag value for locals"); | |
| 993 oop* p = (oop*) interpreter_frame_local_at(i); | |
| 994 // Not always true - too bad. May have dead oops without tags in locals. | |
| 995 // assert(*p == NULL || !(*p)->is_oop(), "oop not tagged on interpreter locals"); | |
| 996 assert(*p == NULL || !mask->is_oop(i), "local oop map mismatch"); | |
| 997 #endif // ASSERT | |
| 998 } | |
| 999 } | |
| 1000 } | |
| 1001 | |
| 1002 void frame::oops_interpreted_expressions_do(OopClosure *f, | |
| 1003 symbolHandle signature, | |
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1004 bool has_receiver, |
| 0 | 1005 int max_stack, |
| 1006 int max_locals, | |
| 1007 InterpreterOopMap *mask) { | |
| 1008 // There is no stack no matter what the esp is pointing to (native methods | |
| 1009 // might look like expression stack is nonempty). | |
| 1010 if (max_stack == 0) return; | |
| 1011 | |
| 1012 // Point the top of the expression stack above arguments to a call so | |
| 1013 // arguments aren't gc'ed as both stack values for callee and callee | |
| 1014 // arguments in callee's locals. | |
| 1015 int args_size = 0; | |
| 1016 if (!signature.is_null()) { | |
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1017 args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); |
| 0 | 1018 } |
| 1019 | |
| 1020 intptr_t *tos_addr = interpreter_frame_tos_at(args_size); | |
| 1021 assert(args_size != 0 || tos_addr == interpreter_frame_tos_address(), "these are same"); | |
| 1022 intptr_t *frst_expr = interpreter_frame_expression_stack_at(0); | |
| 1023 // In case of exceptions, the expression stack is invalid and the esp | |
| 1024 // will be reset to express this condition. Therefore, we call f only | |
| 1025 // if addr is 'inside' the stack (i.e., addr >= esp for Intel). | |
| 1026 bool in_stack; | |
| 1027 if (interpreter_frame_expression_stack_direction() > 0) { | |
| 1028 in_stack = (intptr_t*)frst_expr <= tos_addr; | |
| 1029 } else { | |
| 1030 in_stack = (intptr_t*)frst_expr >= tos_addr; | |
| 1031 } | |
| 1032 if (!in_stack) return; | |
| 1033 | |
| 1034 jint stack_size = interpreter_frame_expression_stack_size() - args_size; | |
| 1035 for (int j = 0; j < stack_size; j++) { | |
| 1036 Tag tag = interpreter_frame_expression_stack_tag(j); | |
| 1037 if (tag == TagReference) { | |
| 1038 oop *addr = (oop*) interpreter_frame_expression_stack_at(j); | |
| 1039 f->do_oop(addr); | |
| 1040 #ifdef ASSERT | |
| 1041 } else { | |
| 1042 assert(tag == TagValue, "bad tag value for stack element"); | |
| 1043 oop *p = (oop*) interpreter_frame_expression_stack_at((j)); | |
| 1044 assert(*p == NULL || !mask->is_oop(j+max_locals), "stack oop map mismatch"); | |
| 1045 #endif // ASSERT | |
| 1046 } | |
| 1047 } | |
| 1048 } | |
| 1049 | |
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1050 void frame::oops_interpreted_arguments_do(symbolHandle signature, bool has_receiver, OopClosure* f) { |
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1051 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f); |
| 0 | 1052 finder.oops_do(); |
| 1053 } | |
| 1054 | |
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1055 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) { |
| 0 | 1056 assert(_cb != NULL, "sanity check"); |
| 1057 if (_cb->oop_maps() != NULL) { | |
| 1058 OopMapSet::oops_do(this, reg_map, f); | |
| 1059 | |
| 1060 // Preserve potential arguments for a callee. We handle this by dispatching | |
| 1061 // on the codeblob. For c2i, we do | |
| 1062 if (reg_map->include_argument_oops()) { | |
| 1063 _cb->preserve_callee_argument_oops(*this, reg_map, f); | |
| 1064 } | |
| 1065 } | |
| 1066 // In cases where perm gen is collected, GC will want to mark | |
| 1067 // oops referenced from nmethods active on thread stacks so as to | |
| 1068 // prevent them from being collected. However, this visit should be | |
| 1069 // restricted to certain phases of the collection only. The | |
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1070 // closure decides how it wants nmethods to be traced. |
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1071 if (cf != NULL) |
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1072 cf->do_code_blob(_cb); |
| 0 | 1073 } |
| 1074 | |
| 1075 class CompiledArgumentOopFinder: public SignatureInfo { | |
| 1076 protected: | |
| 1077 OopClosure* _f; | |
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1078 int _offset; // the current offset, incremented with each argument |
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1079 bool _has_receiver; // true if the callee has a receiver |
| 0 | 1080 frame _fr; |
| 1081 RegisterMap* _reg_map; | |
| 1082 int _arg_size; | |
| 1083 VMRegPair* _regs; // VMReg list of arguments | |
| 1084 | |
| 1085 void set(int size, BasicType type) { | |
| 1086 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset(); | |
| 1087 _offset += size; | |
| 1088 } | |
| 1089 | |
| 1090 virtual void handle_oop_offset() { | |
| 1091 // Extract low order register number from register array. | |
| 1092 // In LP64-land, the high-order bits are valid but unhelpful. | |
| 1093 VMReg reg = _regs[_offset].first(); | |
| 1094 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map); | |
| 1095 _f->do_oop(loc); | |
| 1096 } | |
| 1097 | |
| 1098 public: | |
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1099 CompiledArgumentOopFinder(symbolHandle signature, bool has_receiver, OopClosure* f, frame fr, const RegisterMap* reg_map) |
| 0 | 1100 : SignatureInfo(signature) { |
| 1101 | |
| 1102 // initialize CompiledArgumentOopFinder | |
| 1103 _f = f; | |
| 1104 _offset = 0; | |
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1105 _has_receiver = has_receiver; |
| 0 | 1106 _fr = fr; |
| 1107 _reg_map = (RegisterMap*)reg_map; | |
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1108 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); |
| 0 | 1109 |
| 1110 int arg_size; | |
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1111 _regs = SharedRuntime::find_callee_arguments(signature(), has_receiver, &arg_size); |
| 0 | 1112 assert(arg_size == _arg_size, "wrong arg size"); |
| 1113 } | |
| 1114 | |
| 1115 void oops_do() { | |
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1116 if (_has_receiver) { |
| 0 | 1117 handle_oop_offset(); |
| 1118 _offset++; | |
| 1119 } | |
| 1120 iterate_parameters(); | |
| 1121 } | |
| 1122 }; | |
| 1123 | |
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1124 void frame::oops_compiled_arguments_do(symbolHandle signature, bool has_receiver, const RegisterMap* reg_map, OopClosure* f) { |
| 0 | 1125 ResourceMark rm; |
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1126 CompiledArgumentOopFinder finder(signature, has_receiver, f, *this, reg_map); |
| 0 | 1127 finder.oops_do(); |
| 1128 } | |
| 1129 | |
| 1130 | |
| 1131 // Get receiver out of callers frame, i.e. find parameter 0 in callers | |
| 1132 // frame. Consult ADLC for where parameter 0 is to be found. Then | |
| 1133 // check local reg_map for it being a callee-save register or argument | |
| 1134 // register, both of which are saved in the local frame. If not found | |
| 1135 // there, it must be an in-stack argument of the caller. | |
| 1136 // Note: caller.sp() points to callee-arguments | |
| 1137 oop frame::retrieve_receiver(RegisterMap* reg_map) { | |
| 1138 frame caller = *this; | |
| 1139 | |
| 1140 // First consult the ADLC on where it puts parameter 0 for this signature. | |
| 1141 VMReg reg = SharedRuntime::name_for_receiver(); | |
| 1142 oop r = *caller.oopmapreg_to_location(reg, reg_map); | |
| 1143 assert( Universe::heap()->is_in_or_null(r), "bad receiver" ); | |
| 1144 return r; | |
| 1145 } | |
| 1146 | |
| 1147 | |
| 1148 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const { | |
| 1149 if(reg->is_reg()) { | |
| 1150 // If it is passed in a register, it got spilled in the stub frame. | |
| 1151 return (oop *)reg_map->location(reg); | |
| 1152 } else { | |
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1153 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size; |
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1154 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes); |
| 0 | 1155 } |
| 1156 } | |
| 1157 | |
| 1158 BasicLock* frame::compiled_synchronized_native_monitor(nmethod* nm) { | |
| 1159 if (nm == NULL) { | |
| 1160 assert(_cb != NULL && _cb->is_nmethod() && | |
| 1161 nm->method()->is_native() && | |
| 1162 nm->method()->is_synchronized(), | |
| 1163 "should not call this otherwise"); | |
| 1164 nm = (nmethod*) _cb; | |
| 1165 } | |
| 1166 int byte_offset = in_bytes(nm->compiled_synchronized_native_basic_lock_sp_offset()); | |
| 1167 assert(byte_offset >= 0, "should not see invalid offset"); | |
| 1168 return (BasicLock*) &sp()[byte_offset / wordSize]; | |
| 1169 } | |
| 1170 | |
| 1171 oop frame::compiled_synchronized_native_monitor_owner(nmethod* nm) { | |
| 1172 if (nm == NULL) { | |
| 1173 assert(_cb != NULL && _cb->is_nmethod() && | |
| 1174 nm->method()->is_native() && | |
| 1175 nm->method()->is_synchronized(), | |
| 1176 "should not call this otherwise"); | |
| 1177 nm = (nmethod*) _cb; | |
| 1178 } | |
| 1179 int byte_offset = in_bytes(nm->compiled_synchronized_native_basic_lock_owner_sp_offset()); | |
| 1180 assert(byte_offset >= 0, "should not see invalid offset"); | |
| 1181 oop owner = ((oop*) sp())[byte_offset / wordSize]; | |
| 1182 assert( Universe::heap()->is_in(owner), "bad receiver" ); | |
| 1183 return owner; | |
| 1184 } | |
| 1185 | |
| 1186 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) { | |
| 1187 assert(map != NULL, "map must be set"); | |
| 1188 if (map->include_argument_oops()) { | |
| 1189 // must collect argument oops, as nobody else is doing it | |
| 1190 Thread *thread = Thread::current(); | |
| 1191 methodHandle m (thread, entry_frame_call_wrapper()->callee_method()); | |
| 1192 symbolHandle signature (thread, m->signature()); | |
| 1193 EntryFrameOopFinder finder(this, signature, m->is_static()); | |
| 1194 finder.arguments_do(f); | |
| 1195 } | |
| 1196 // Traverse the Handle Block saved in the entry frame | |
| 1197 entry_frame_call_wrapper()->oops_do(f); | |
| 1198 } | |
| 1199 | |
| 1200 | |
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1201 void frame::oops_do_internal(OopClosure* f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) { |
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1202 #ifndef PRODUCT |
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1203 // simulate GC crash here to dump java thread in error report |
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1204 if (CrashGCForDumpingJavaThread) { |
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1205 char *t = NULL; |
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1206 *t = 'c'; |
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1207 } |
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1208 #endif |
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1209 if (is_interpreted_frame()) { |
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1210 oops_interpreted_do(f, map, use_interpreter_oop_map_cache); |
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1211 } else if (is_entry_frame()) { |
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1212 oops_entry_do(f, map); |
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1213 } else if (CodeCache::contains(pc())) { |
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1214 oops_code_blob_do(f, cf, map); |
| 0 | 1215 } else { |
| 1216 ShouldNotReachHere(); | |
| 1217 } | |
| 1218 } | |
| 1219 | |
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1220 void frame::nmethods_do(CodeBlobClosure* cf) { |
| 0 | 1221 if (_cb != NULL && _cb->is_nmethod()) { |
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1222 cf->do_code_blob(_cb); |
| 0 | 1223 } |
| 1224 } | |
| 1225 | |
| 1226 | |
| 1227 void frame::gc_prologue() { | |
| 1228 if (is_interpreted_frame()) { | |
| 1229 // set bcx to bci to become methodOop position independent during GC | |
| 1230 interpreter_frame_set_bcx(interpreter_frame_bci()); | |
| 1231 } | |
| 1232 } | |
| 1233 | |
| 1234 | |
| 1235 void frame::gc_epilogue() { | |
| 1236 if (is_interpreted_frame()) { | |
| 1237 // set bcx back to bcp for interpreter | |
| 1238 interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp()); | |
| 1239 } | |
| 1240 // call processor specific epilog function | |
| 1241 pd_gc_epilog(); | |
| 1242 } | |
| 1243 | |
| 1244 | |
| 1245 # ifdef ENABLE_ZAP_DEAD_LOCALS | |
| 1246 | |
| 1247 void frame::CheckValueClosure::do_oop(oop* p) { | |
| 1248 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) { | |
| 1249 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); | |
| 1250 } | |
| 1251 } | |
| 1252 frame::CheckValueClosure frame::_check_value; | |
| 1253 | |
| 1254 | |
| 1255 void frame::CheckOopClosure::do_oop(oop* p) { | |
| 1256 if (*p != NULL && !(*p)->is_oop()) { | |
| 1257 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); | |
| 1258 } | |
| 1259 } | |
| 1260 frame::CheckOopClosure frame::_check_oop; | |
| 1261 | |
| 1262 void frame::check_derived_oop(oop* base, oop* derived) { | |
| 1263 _check_oop.do_oop(base); | |
| 1264 } | |
| 1265 | |
| 1266 | |
| 1267 void frame::ZapDeadClosure::do_oop(oop* p) { | |
| 1268 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p); | |
| 1269 // Need cast because on _LP64 the conversion to oop is ambiguous. Constant | |
| 1270 // can be either long or int. | |
| 1271 *p = (oop)(int)0xbabebabe; | |
| 1272 } | |
| 1273 frame::ZapDeadClosure frame::_zap_dead; | |
| 1274 | |
| 1275 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) { | |
| 1276 assert(thread == Thread::current(), "need to synchronize to do this to another thread"); | |
| 1277 // Tracing - part 1 | |
| 1278 if (TraceZapDeadLocals) { | |
| 1279 ResourceMark rm(thread); | |
| 1280 tty->print_cr("--------------------------------------------------------------------------------"); | |
| 1281 tty->print("Zapping dead locals in "); | |
| 1282 print_on(tty); | |
| 1283 tty->cr(); | |
| 1284 } | |
| 1285 // Zapping | |
| 1286 if (is_entry_frame ()) zap_dead_entry_locals (thread, map); | |
| 1287 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map); | |
| 1288 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map); | |
| 1289 | |
| 1290 else | |
| 1291 // could be is_runtime_frame | |
| 1292 // so remove error: ShouldNotReachHere(); | |
| 1293 ; | |
| 1294 // Tracing - part 2 | |
| 1295 if (TraceZapDeadLocals) { | |
| 1296 tty->cr(); | |
| 1297 } | |
| 1298 } | |
| 1299 | |
| 1300 | |
| 1301 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) { | |
| 1302 // get current interpreter 'pc' | |
| 1303 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 1304 methodOop m = interpreter_frame_method(); | |
| 1305 int bci = interpreter_frame_bci(); | |
| 1306 | |
| 1307 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); | |
| 1308 | |
| 1309 if (TaggedStackInterpreter) { | |
| 1310 InterpreterOopMap *mask = NULL; | |
| 1311 #ifdef ASSERT | |
| 1312 InterpreterOopMap oopmap_mask; | |
| 1313 methodHandle method(thread, m); | |
| 1314 OopMapCache::compute_one_oop_map(method, bci, &oopmap_mask); | |
| 1315 mask = &oopmap_mask; | |
| 1316 #endif // ASSERT | |
| 1317 oops_interpreted_locals_do(&_check_oop, max_locals, mask); | |
| 1318 } else { | |
| 1319 // process dynamic part | |
| 1320 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(), | |
| 1321 &_check_value); | |
| 1322 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(), | |
| 1323 &_check_oop ); | |
| 1324 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(), | |
| 1325 &_zap_dead ); | |
| 1326 | |
| 1327 // get frame map | |
| 1328 InterpreterOopMap mask; | |
| 1329 m->mask_for(bci, &mask); | |
| 1330 mask.iterate_all( &oop_blk, &value_blk, &dead_blk); | |
| 1331 } | |
| 1332 } | |
| 1333 | |
| 1334 | |
| 1335 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) { | |
| 1336 | |
| 1337 ResourceMark rm(thread); | |
| 1338 assert(_cb != NULL, "sanity check"); | |
| 1339 if (_cb->oop_maps() != NULL) { | |
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1340 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value); |
| 0 | 1341 } |
| 1342 } | |
| 1343 | |
| 1344 | |
| 1345 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) { | |
| 1346 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented"); | |
| 1347 } | |
| 1348 | |
| 1349 | |
| 1350 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) { | |
| 1351 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented"); | |
| 1352 } | |
| 1353 | |
| 1354 # endif // ENABLE_ZAP_DEAD_LOCALS | |
| 1355 | |
| 1356 void frame::verify(const RegisterMap* map) { | |
| 1357 // for now make sure receiver type is correct | |
| 1358 if (is_interpreted_frame()) { | |
| 1359 methodOop method = interpreter_frame_method(); | |
| 1360 guarantee(method->is_method(), "method is wrong in frame::verify"); | |
| 1361 if (!method->is_static()) { | |
| 1362 // fetch the receiver | |
| 1363 oop* p = (oop*) interpreter_frame_local_at(0); | |
| 1364 // make sure we have the right receiver type | |
| 1365 } | |
| 1366 } | |
| 1367 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");) | |
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1368 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, (RegisterMap*)map, false); |
| 0 | 1369 } |
| 1370 | |
| 1371 | |
| 1372 #ifdef ASSERT | |
| 1373 bool frame::verify_return_pc(address x) { | |
| 1374 if (StubRoutines::returns_to_call_stub(x)) { | |
| 1375 return true; | |
| 1376 } | |
| 1377 if (CodeCache::contains(x)) { | |
| 1378 return true; | |
| 1379 } | |
| 1380 if (Interpreter::contains(x)) { | |
| 1381 return true; | |
| 1382 } | |
| 1383 return false; | |
| 1384 } | |
| 1385 #endif | |
| 1386 | |
| 1387 | |
| 1388 #ifdef ASSERT | |
| 1389 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const { | |
| 1390 assert(is_interpreted_frame(), "Not an interpreted frame"); | |
| 1391 // verify that the value is in the right part of the frame | |
| 1392 address low_mark = (address) interpreter_frame_monitor_end(); | |
| 1393 address high_mark = (address) interpreter_frame_monitor_begin(); | |
| 1394 address current = (address) value; | |
| 1395 | |
| 1396 const int monitor_size = frame::interpreter_frame_monitor_size(); | |
| 1397 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*"); | |
| 1398 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark"); | |
| 1399 | |
| 1400 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*"); | |
| 1401 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark"); | |
| 1402 } | |
| 1403 #endif | |
| 1404 | |
| 1405 | |
| 1406 //----------------------------------------------------------------------------------- | |
| 1407 // StackFrameStream implementation | |
| 1408 | |
| 1409 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) { | |
| 1410 assert(thread->has_last_Java_frame(), "sanity check"); | |
| 1411 _fr = thread->last_frame(); | |
| 1412 _is_done = false; | |
| 1413 } |